Additional work to get array literal allocation tracking working, even with --always-opt

src/codegen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 78 matching lines @@
 // generated code both in runtime and compiled code.
 typedef double (*UnaryMathFunction)(double x);
 
 UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type);
 UnaryMathFunction CreateExpFunction();
 UnaryMathFunction CreateSqrtFunction();
 
 
 class ElementsTransitionGenerator : public AllStatic {
  public:
-  static void GenerateMapChangeElementsTransition(MacroAssembler* masm);
+  // If fail is not null, then allocation site info checking is enabled
+  static void GenerateMapChangeElementsTransition(MacroAssembler* masm,
+                                                  Label* fail = NULL);

[danno, 2013/01/10 22:58:59]

Maybe it makes sense to not provide a default value for fail (which should be
called allocation_site_info_found), it forces callees to consciously decide
(forgetting the parameter could cause subtle bugs).

[mvstanton, 2013/01/11 13:43:01]

Done.

   static void GenerateSmiToDouble(MacroAssembler* masm, Label* fail);
   static void GenerateDoubleToObject(MacroAssembler* masm, Label* fail);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator);
 };
 
 
 class SeqStringSetCharGenerator : public AllStatic {
  public:
   static void Generate(MacroAssembler* masm,
                        String::Encoding encoding,
                        Register string,
                        Register index,
                        Register value);
  private:
   DISALLOW_COPY_AND_ASSIGN(SeqStringSetCharGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_